51
Safety Manual
00809-0200-5100, Rev GB
Proof Test
February 2017
Proof Test
Section 5 Proof Test
The Rosemount Tank Gauging Safety System should be checked at regular intervals in order to
detect Dangerous Undetected (DU) failures.
The test must be repeated at regular intervals. The time periods depend on the PFD
avg
value.
Note! Proof test for PFD
avg
calculations is only applicable for Low Demand mode.
The level measuring function can be verified via TankMaster WinOpi and TankMaster WinSetup.
For information about how to verify the relay function see “Verification of the relay function” on
page 53.
Note
The Rosemount 5900 gauge is not safety-rated during maintenance work, configuration
changes, or other activity that affects the Safety Function. Alternative means should be used to
ensure process safety during such activities.
One or more of the proof tests described below are recommended.
The SIL High Alarm test is performed by using a Reference Reflector as described in “SIL High
Alarm test” on page 55.
Ensure that the proof test is performed with the same product type used when the tank was
configured and approved for SIL Safety Alarm operation.
Note
For a dual channel system (1oo2D
(1)
) complying with SIL 3 both level gauges must be tested.
(1) See “Functional specification of the safety function” on page 8.
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